I think you answered this in a previous comment, however I can't recall what the answer was; I was looking to sorta have my character learn a wide variety of magic, including both Nether and Aether, however I don't want to make any hard choices about what route I'm wanting to go, and the growing Aether and Nether corruption from learning magic plus a few of the lines has me a bit concerned that I might accidently get locked into a path inadvertently; am I safe to learn Aether or Nether magic without being locked into a route, or s that something that I have to be cautious and aware of that at some point I will either have to make a choice or accept what I have?
I absolutely hate surprise gotchas, so you won't be locked into a path without warning.
It's fine to dabble in both Aether/Nether, but down the road if you choose to pursue either corruption to its peak, there will be two (clearly labeled) progressive choices you have to make about aether/nether corruptions, and a third route of trying to master both, each of which will have its own ups and downsides.